When a star is fusing iron in its core, it's still giving off insane amounts of energy. ... Iron cannot be fused into anything heavier because of the insane amounts of energy and force required to fuse iron atoms. The atomic structure of iron is very stable, more so than most other elements.
If a HYPOTHESIS is wrong scientists come up with a conclusion, the hypothesis doesn't matter for the result. It is just an educated guess based on the results they expect our hope the achieve.
